4-14 Troubleshooting Model 2500 Service Manual
No comm link error
A “No Comm Link” error message indicates that the front panel processor has stopped
communicating with the main processor, which is located on the mother board. This error
indicates that the main processor ROMs may require reseating in their sockets. The ROMs
may be reseated as follows:
1. Turn off the power, and disconnect the line cord and all other test leads and cables
from the instrument.
2. Remove the case cover as outlined in Section 5.
3. Locate the firmware ROMs located on the digital section of the mother board.
These ROMs are the only IC installed in a socket. (Refer to the 2500-100 compo-
nent layout drawing at the end of Section 6 for exact location.)
CAUTION Be careful not to push down excessively, or you might crack the mother
board.
4. Carefully push down on the ROM ICs to make sure it is properly seated in its
socket.
5. Connect the line cord, and turn on the power. If the problem persists, additional
troubleshooting will be required.
To Next Page
Loading...
Need help?
General
